Fix minor bugs

graphql-rails.gemspec

@@ -5,6 +5,7 @@ require 'graphql/rails/version'
 Gem::Specification.new do |s|
   s.name        = 'graphql-rails'
   s.version     = GraphQL::Rails::VERSION
+  s.license     = 'MIT'
   s.authors     = ['James Reggio']
   s.email       = ['james.reggio@gmail.com']
   s.homepage    = 'https://github.com/jamesreggio/graphql-rails'
@@ -16,7 +17,7 @@ Allows you to specify GraphQL queries and mutations as though they were
 controller actions. Automatically maps Mongoid models to GraphQL types.
 Seamlessly integrates with CanCan.
   EOM
-  s.license     = 'MIT'
+  s.required_ruby_version = '>= 2.1.0'
 
   s.files       = Dir['{app,config,lib}/**/*', 'LICENSE']
   s.required_ruby_version = '>= 2.1.0'

lib/graphql/rails/dsl.rb

@@ -13,6 +13,8 @@ def run(&block)
         instance_eval(&block)
       end
 
+      private
+
       def method_missing(method, *args, &block)
         begin
           @self.send(method, *args, &block)

lib/graphql/rails/extensions/cancan.rb

@@ -18,7 +18,7 @@ def self.check_authorization(options = {})
           end
         end
 
-        def skip_authorization_check(*args)
+        def self.skip_authorization_check(*args)
           self.before_filter(*args) do |instance|
             instance.instance_variable_set(:@authorized, true)
           end

lib/graphql/rails/extensions/mongoid.rb

@@ -48,6 +48,7 @@ def namespace
         # mappings for common built-in scalar types.
         def types
           @types ||= {
+            Boolean => GraphQL::BOOLEAN_TYPE,
             ::Mongoid::Boolean => GraphQL::BOOLEAN_TYPE,
             BSON::ObjectId => GraphQL::STRING_TYPE,
           }

lib/graphql/rails/node_identification.rb

@@ -2,6 +2,7 @@ module GraphQL
   module Rails
     # Implements globally-unique object IDs for Relay compatibility.
     NodeIdentification = GraphQL::Relay::GlobalNodeIdentification.define do
+      # TODO: Add security checks.
       object_from_id -> (id, ctx) do
         Types.lookup(*NodeIdentification.from_global_id(id))
       end

lib/graphql/rails/operations.rb

@@ -48,6 +48,7 @@ def self.query(hash, &block)
       private
 
       # DSL for query definition.
+      # TODO: Support resolve-only blocks.
       class QueryDefinition < DSL
         attr_reader :field
 

lib/graphql/rails/types.rb

@@ -86,7 +86,6 @@ def to_field_name(name)
       def types
         @types ||= {
           String => GraphQL::STRING_TYPE,
-          Boolean => GraphQL::BOOLEAN_TYPE,
 
           Fixnum => GraphQL::INT_TYPE,
           Integer => GraphQL::INT_TYPE,